I've prepared a uniform with the pieces you obtained. It is magically enhanced to complete the illusion.

We spotted Commander Dawnforge going in to meet Arcanist Ardonis a few minutes ago. He had a full retinue of guards with him, so whatever they're discussing is bound to be incredibly important; see if you can catch any of it.

Oh, I almost forgot. You'll want to stay away from the arcane golems patrolling the manaforge. They will see right through the illusion.

The following dialogue occurs when you approach Arcanist Ardonis while in disguise.

Commander Dawnforge says: We need you to send reinforcements to Manaforge Duro, Ardonis. This is not a request, it's an order.Arcanist Ardonis says: You cannot be serious! We are severely understaffed and can barely keep this manaforge functional!Commander Dawnforge says: You will do as ordered. Manaforge Duro has come under heavy attack by mana creatures and the situation is out of control. Failure to comply will not be tolerated!Pathaleon the Calculator's image says: Indeed, it is not a request.Commander Dawnforge says: My lord!Pathaleon the Calculator's image says: Duro will be reinforced! Ultris was a complete disaster. I will NOT have that mistake repeated!Pathaleon the Calculator's image says: We've had too many setbacks along the way: Hellfire Citadel, Fallen Sky Ridge, Firewing Point... Prince Kael'thas will tolerate no further delays. I will tolerate nothing other than complete success!Pathaleon the Calculator's image says: I am returning to Tempest Keep. See to it that I do not have reason to return!Commander Dawnforge says: Yes, my lord.Arcanist Ardonis says: Yes, my lord.Commander Dawnforge says: See to it, Ardonis!